Gat one point in a pipeline, the water speed is 1.8 m/s, and the gauge pressure is 51500 pa. find the gauge pressure (in pa) at a second point in the line 11.5 m lower than the first if the pipe diameter at the second point is twice that at the first. use a density of water 1000 kg/m3.

15.3 cos 65 degrees trig

the doppler effect is used by weather forecasters to measure 

moving clouds

the moving of the box is a result of centripetal force. think of that  as a car or a truck in this case creates a turn, the force of friction performing upon the turned wheels of the car runs centripetal force obligatory for circular motion for the things inside it.